Changing magnetic field creates potential difference

This electric field creates a potential difference, which can be explained by Faraday's law and special relativity.In summary, Faraday's law explains the relationship between changing magnetic fields and induced electric fields, which can be observed in the example of a loop of wire inside an inductor with a constant magnetic field and changing currents. This can be understood through the principles of magnetic flux and special relativity.
  • #1
Strafespar
47
0
I can understand Faraday's law when viewed in this situation:

A loop moves into an area of constant magnetic field. I understand this because in terms of the Lorentz force it works and creates the same answer using magnetic flux/faraday's law. Now consider the example of the loop of wire inside an inductor with constant magnetic field throughout the inside. When the current is changed with time this creates a potential difference as well in the loop. I can't understand this in terms of the Lorentz force and thus special relativity. I have searched the forums and online but can't find an adequate solution.

Thanks in advance.
 
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  • #2
The changing currents create a changing magnetic field which, by Faraday's law of induction, induces an electric Field.
 

FAQ: Changing magnetic field creates potential difference

How does a changing magnetic field create potential difference?

When a magnetic field changes, it creates a flow of electric charges. This flow of charges, also known as an electric current, creates a potential difference, or a difference in the electric potential energy, between two points. This is known as electromagnetic induction.

What is the relationship between a changing magnetic field and potential difference?

The relationship between a changing magnetic field and potential difference is known as Faraday's law of electromagnetic induction. It states that the magnitude of the induced potential difference is directly proportional to the rate of change of the magnetic field.

How is potential difference affected by the strength of the changing magnetic field?

The strength of the changing magnetic field directly affects the magnitude of the potential difference created. A stronger magnetic field will result in a larger potential difference, while a weaker magnetic field will result in a smaller potential difference.

Can a changing magnetic field create a potential difference in any material?

Yes, a changing magnetic field can create a potential difference in any material, as long as it is conductive. This is because the flow of electric charges, which creates the potential difference, can only occur in materials that allow the movement of charges.

How is potential difference used in practical applications?

Potential difference created by a changing magnetic field is used in various practical applications, such as generators, transformers, and electric motors. It is also used in wireless charging technology, where the changing magnetic field is used to induce a potential difference in a receiving device to charge it without the need for physical contact.

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